Halpin-Tsai relationship for rubber/PH blends
It is well known that the mechanical properties of a
polymer blend are governed by microstructure of
the dispersed phase and properties of individual
phases.33,34 Hence, as a further evidence to the microstructural
behavior of the rubber/PH blends, modulus
of these blends is investigated by varying the
amount of PH in the blend ranging between 0 and 25
vol %, while concentration of the rubber curing ingredients
is kept constant, i.e., sulfur 2 phr, MBTS 2 phr,
stearic acid 2 phr and zinc oxide 5 phr. To take into
consideration the role of sulfur content on the morphological
behavior, variation of blend modulus with
the PH concentration is also investigated at higher sulfur
content, i.e., 7 phr, while the concentration of other
curing ingredients is the same as earlier.